# Ignition coil replacement cost

- **Typical cost:** $150-$400 for one coil
- **Parts:** $40-$200
- **Labor:** 0.3-1.5 hours per coil
- **Dealer:** $250-$550

## Quick answer

Replacing one ignition coil usually costs $150 to $400 at an independent shop, including diagnosis. Coils on top of a four-cylinder engine are quick to swap. Coils on the rear bank of a V6 or under covers on luxury cars take longer. Replacing a full set costs more, but is not always needed.

## What is ignition coil and why does it need replacing?

An ignition coil turns the car's 12 volts into the very high voltage, often tens of thousands of volts, needed to jump the spark plug gap and light the fuel and air in a cylinder. Most modern engines have one coil sitting directly on each spark plug, called coil-on-plug, while some use coil packs that fire two cylinders. The engine computer tells each coil exactly when to fire.

Coils fail from heat, vibration and electrical stress. Years of engine heat crack the coil's insulation, and a rubber boot that hardens or tears can let spark leak to ground. Worn spark plugs with wide gaps make the coil work harder and are a common cause of early coil failure. Oil leaking into the plug wells from a bad valve cover or tube seal can damage the boot. A failing coil causes a misfire on one cylinder, usually with a code such as P0301. Coils have no set replacement interval; many last well over 100,000 miles, but they fail one at a time.

## How much does ignition coil replacement cost?

|  | Typical cost for one coil |
| --- | --- |
| Parts | $40-$200 |
| Labor | $100-$200 (0.3-1.5 hours per coil) |
| Total at an independent shop | $150-$400 |
| Total at a dealer | $250-$550 |
| Do it yourself (parts only) | $40-$200 |

## Cost by vehicle type

| Vehicle | Typical cost for one coil |
| --- | --- |
| Compact car | $150-$250 |
| Midsize sedan | $160-$300 |
| Small SUV/crossover | $170-$320 |
| Full-size truck/SUV | $180-$350 |
| Luxury/European | $250-$400 |

Ranges are for an independent shop. Expect the high end or more for European luxury makes and dealer service.

## What changes the price?

- **Access to the coil.** Coils on top of a four-cylinder engine come out in minutes. Rear-bank coils on some transverse V6 engines need the intake plenum removed, which can turn a cheap part into an hour or more of labor.
- **Part quality.** Original-equipment coils cost more than economy aftermarket coils. Cheap coils can work, but some fail sooner or misfire under load, which means paying the shop again, so a known brand is usually worth it.
- **Diagnosis.** Shops charge to confirm the coil is the problem, often by swapping it to another cylinder and watching the misfire move. That check is worth paying for, since plugs, injectors and wiring can cause the same code.
- **Spark plugs at the same time.** If the spark plugs are due or worn, doing them while the coil is out saves labor later. It raises today's bill, but worn plugs also strain coils and can make the new one fail early.

## Can you do it yourself?

Difficulty: **Easy**, about 15-45 minutes. Parts cost $40-$200, so doing it yourself saves the labor ($100-$200).

## What happens during the job?

1. Read the misfire codes and live misfire counts to find which cylinder is affected.
2. Swap the suspect coil to another cylinder and see whether the misfire moves with it, or test it with an ignition tester.
3. Remove any engine cover or intake parts in the way, unplug the coil and pull it out of the plug well.
4. Inspect the spark plug, coil boot and plug well for wear, cracks or oil, and fit the new coil.
5. Clear the codes, check live misfire data and test-drive the car under load.

## What should a fair quote include?

- Confirming which cylinder is misfiring
- The new coil
- Checking the spark plug and coil boot on that cylinder
- Clearing codes and a test drive

## How to pay less for ignition coil replacement

- Replace only the failed coil unless several are misfiring; coils have no set replacement interval.
- Do the swap yourself on engines where the coils sit on top; it often takes only minutes with basic tools.
- Buy a coil from the original maker or a known brand rather than the cheapest option, which can fail sooner.
- Replace spark plugs that are due at the same visit, since worn plugs strain coils and the labor overlaps.
- Fix oil leaks into the plug wells so oil does not ruin the new coil's boot.

## Signs you need it

- Check engine light, steady or flashing
- Misfire code for one cylinder, such as P0301
- Shaking or rough idle
- Hesitation or jerking when accelerating

## Frequently asked questions

### How much does it cost to replace an ignition coil?

Expect $150 to $400 for one coil at an independent shop in 2026. Dealers usually charge $250 to $550. Replacing all the coils on a V6 or V8 can cost several times more. The coil itself costs about $40 to $200, and diagnosis is often included.

### Should I replace all ignition coils at once?

Usually not. Coils fail one at a time and there is no set replacement interval. Replacing only the failed coil is fine unless several are acting up. On rear-bank coils that need the intake removed, doing all three while it is apart can save labor later.

### Can I drive with a bad ignition coil?

Only briefly and gently. A flashing check engine light means a severe misfire that can overheat and damage the catalytic converter. Unburned fuel from the dead cylinder can also wash oil from the cylinder wall. Get it fixed soon and avoid hard acceleration until then.

### What are the symptoms of a bad ignition coil?

Common signs are a rough idle, shaking at stops, hesitation or jerking when accelerating and a check engine light that may flash. Most cars store a misfire code for one cylinder, such as P0301 or P0304. Fuel economy may also drop while the misfire continues.

### How do I know if it is the coil or the spark plug?

Swap the coil from the misfiring cylinder with one from another cylinder, clear the codes and drive. If the misfire moves to the new cylinder, the coil is bad. If it stays, check the spark plug next, then the fuel injector and wiring on that cylinder.

### Can I replace an ignition coil myself?

Yes, on most engines with coils on top. Remove the engine cover, unplug the coil, remove one bolt and pull it out. It often takes 15 to 45 minutes. Rear-bank coils on some V6 engines need the intake removed, which is a bigger job.

### How long do ignition coils last?

There is no set lifespan, and many coils last well over 100,000 miles. Heat, vibration, worn spark plugs and oil in the plug wells shorten their life. Because coils fail one at a time, a single failure does not mean the others are about to fail.

### What causes ignition coils to fail?

Heat and age break down the coil's insulation over time. Worn spark plugs with wide gaps force the coil to produce higher voltage, which strains it. Oil leaking into the plug wells damages boots, and moisture from washing the engine can cause arcing. Fixing these causes protects the new coil.

### Will a bad ignition coil damage the catalytic converter?

It can. A misfiring cylinder sends unburned fuel into the exhaust, where it burns inside the converter and overheats it. A flashing check engine light warns of this. Replacing a $40 to $200 coil promptly is much cheaper than replacing a converter that can cost $1,000 or more.

### Do I need new spark plugs when I replace a coil?

Not always, but check the plug in that cylinder. If the plugs are near their replacement interval or worn, replace them while you are there, since worn plugs strain coils. If the plugs are fairly new, replacing only the coil is fine.

## Sources

- [Car Care Council: Car care guide](https://www.carcare.org/car-care-guide/)
- [EPA: On-Board Diagnostics (OBD)](https://www.epa.gov/state-and-local-transportation/vehicle-emissions-board-diagnostics-obd)

## How long it lasts

- [How often should you change your spark plugs?](https://diagxcar.com/how-often/change-spark-plugs): 30,000-100,000 miles

## Symptoms

- [Why is my car idling rough?](https://diagxcar.com/symptoms/rough-idle)
- [Why does my car hesitate when I accelerate?](https://diagxcar.com/symptoms/car-hesitates-when-accelerating)
- [Why does my car stall while driving?](https://diagxcar.com/symptoms/car-stalls-while-driving)
- [Why does my car crank but not start?](https://diagxcar.com/symptoms/car-cranks-but-wont-start)
- [Why does my car jerk when I accelerate?](https://diagxcar.com/symptoms/car-jerks-when-accelerating)
- [Why does my car lose power when accelerating?](https://diagxcar.com/symptoms/car-loses-power-when-accelerating)
- [Why does my car shake at idle?](https://diagxcar.com/symptoms/car-shakes-at-idle)
- [Why does my car shake when I accelerate?](https://diagxcar.com/symptoms/car-shakes-when-accelerating)

## Related codes

- [P0300 Random/Multiple Cylinder Misfire Detected](https://diagxcar.com/codes/p0300)
- [P0301 Cylinder 1 Misfire Detected](https://diagxcar.com/codes/p0301)
- [P0302 Cylinder 2 Misfire Detected](https://diagxcar.com/codes/p0302)
- [P0303 Cylinder 3 Misfire Detected](https://diagxcar.com/codes/p0303)
- [P0304 Cylinder 4 Misfire Detected](https://diagxcar.com/codes/p0304)
- [P0305 Cylinder 5 Misfire Detected](https://diagxcar.com/codes/p0305)
- [P0306 Cylinder 6 Misfire Detected](https://diagxcar.com/codes/p0306)
- [P0351 Ignition Coil "A" Primary/Secondary Circuit](https://diagxcar.com/codes/p0351)
- [P0307 Cylinder 7 Misfire Detected](https://diagxcar.com/codes/p0307)
- [P0308 Cylinder 8 Misfire Detected](https://diagxcar.com/codes/p0308)
- [P0320 Ignition/Distributor Engine Speed Input Circuit](https://diagxcar.com/codes/p0320)
- [P0352 Ignition Coil "B" Primary/Secondary Circuit](https://diagxcar.com/codes/p0352)

## Other repair costs

- [Knock sensor replacement cost](https://diagxcar.com/cost/knock-sensor-replacement): $180-$950
- [Heater core replacement cost](https://diagxcar.com/cost/heater-core-replacement): $750-$2,000
- [Mass air flow sensor replacement cost](https://diagxcar.com/cost/mass-air-flow-sensor-replacement): $150-$450
- [Headlight bulb replacement cost](https://diagxcar.com/cost/headlight-bulb-replacement): $30-$300
- [Muffler replacement cost](https://diagxcar.com/cost/muffler-replacement): $200-$600
- [Head gasket replacement cost](https://diagxcar.com/cost/head-gasket-replacement): $1,400-$3,000
- [Oil change cost](https://diagxcar.com/cost/oil-change): $45-$150
- [Fuel pump replacement cost](https://diagxcar.com/cost/fuel-pump-replacement): $450-$1,300
- [Oxygen sensor replacement cost](https://diagxcar.com/cost/oxygen-sensor-replacement): $150-$450
- [Fuel injector replacement cost](https://diagxcar.com/cost/fuel-injector-replacement): $300-$1,500

## Warning lights linked to this

- [Check engine light](https://diagxcar.com/warning-lights/check-engine)

## Terms explained

- [What is Misfire?](https://diagxcar.com/glossary/misfire)

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Source page: https://diagxcar.com/cost/ignition-coil-replacement
Updated: 2026-11-03
General information, not a substitute for a qualified mechanic.